STM Aluminium Air Operated Diaphragm Pump
The STM DQBY40AAB and DQBY50AAB are heavy-duty aluminium air-operated double diaphragm pumps available in 1Ā½" and 2" configurations respectively. Designed for demanding industrial fluid transfer applications, both models offer high flow rates, a maximum discharge pressure of 6.9 bar and compatibility with a wide range of diaphragm materials including Buna-N, Neoprene, EPDM, Viton, Teflon and PP. With NPT and BSPT connections as standard and multiple pump body material options available, these pumps can be specified to suit virtually any fluid handling requirement.
DQBY40AAB : Main Specifications & External Dimensions
Main Specifications
| Model | DQBY40AAB |
| Suction / Discharge Size | 1Ā½" (40mm) |
| Max Flow Rate | 140 L/min |
| Max Discharge Pressure | 6.9 Bar |
| Max Suction Lift | 5m |
| Max Grain Diameter | 4.5mm |
| Max Air Consumption | 600 L/min |
| Pump Body Material | Aluminium Alloy ā also available in Cast Iron, Stainless Steel, Engineering Plastic PP/PVDF, Fluorine Lined |
| Diaphragm Material Options | Buna-N (NBR), Neoprene (CR), EPDM, Viton (F), Teflon (F46), PP |
| Connection Types | NPT, BSPT |
External Dimensions
| A ā Overall Width | 379mm |
| B ā Overall Height | 420mm |
| C ā Base Width | 248.4mm |
| E ā Port Offset | 87.5mm |
| F ā Foot Length | 236mm |
| G ā Flange Width | 146mm |
| H ā Flange Height | 190mm |
| M ā Port Diameter | 46mm |
| N ā Centre Height | 346mm |
| Z*b ā Mounting Holes | 4 x 12mm |
DQBY50AAB : Main Specifications & External Dimensions
MAIN SPECIFICATIONS
| Model | DQBY50AAB |
| Suction / Discharge Size | 2" (50mm) |
| Max Flow Rate | 240 L/min |
| Max Discharge Pressure | 6.9 Bar |
| Max Suction Lift | 5m |
| Max Grain Diameter | 8mm |
| Max Air Consumption | 900 L/min |
| Pump Body Material | Aluminium Alloy ā also available in Cast Iron, Stainless Steel, Engineering Plastic PP/PVDF, Fluorine Lined |
| Diaphragm Material Options | Buna-N (NBR), Neoprene (CR), EPDM, Viton (F), Teflon (F46), PP |
| Connection Types | NPT, BSPT, ANSI Flanged, DIN Flanged |
External Dimensions
| A ā Overall Width | 518mm |
| B ā Overall Height | 642mm |
| C ā Base Width | 347mm |
| E ā Port Offset | 110mm |
| F ā Foot Length | 320mm |
| G ā Flange Width | 220mm |
| H ā Flange Height | 254mm |
| M ā Port Diameter | 83mm |
| N ā Centre Height | 521mm |
| Z*b ā Mounting Holes | 4 x 14mm |
Features
| ā¢Air-operated double diaphragm design for reliable, self-priming fluid transfer with no electrical hazard |
| ā¢Wide choice of diaphragm materials (Buna-N, Neoprene, EPDM, Viton, Teflon, PP) to match fluid compatibility requirements |
| ā¢Multiple pump body material options: Aluminium Alloy, Cast Iron, Stainless Steel, Engineering Plastic and Fluorine Lined |
| ā¢NPT and BSPT connections standard; ANSI and DIN flanged connections also available on DQBY50AAB |
| ā¢Handles solids up to 4.5mm grain diameter (DQBY40AAB) and 8mm (DQBY50AAB) |
| ā¢Inlet and outlet available in side or centre body configuration ā specify at time of order |
Applications
| ā¢Transfer of acids, alkalis, solvents and corrosive chemicals in processing and manufacturing environments |
| ā¢Pumping oils, fuels, lubricants and viscous fluids in industrial and workshop applications |
| ā¢Handling slurries and fluids containing solids in mining, construction and water treatment |
| ā¢Paint, coating and adhesive transfer in automotive and manufacturing operations |
Always verify diaphragm and pump body material compatibility with the fluid being pumped prior to installation. Inlet and outlet port position (side or centre body) must be specified at time of order. Maximum air supply pressure is 7 BAR as indicated on the performance graphs.
The information contained in this data sheet is based on data considered to be accurate. No warranty is expressed or implied regarding the accuracy of this data. Product specifications and availability are subject to change without notice. Lube Control Pty Ltd accepts no responsibility for any loss or damage arising from the use of this information.
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Technical Documents
Aluminium Air Operated Diaphragm Pump
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Technical specifications may change. Please confirm with the manufacturer.
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